(19)

(11)

EP 0 818 097 A1

(12)

(43) Date of publication: 14.01.1998 Bulletin 1998/03 (21) Application number: 96909425.0 (22) Date of filing: 26.03.1996

(51) International Patent Classification (IPC):  H04J 3/ 24( . ) H04Q 11/ 04( . ) H04L 12/ 64( . ) H04L 12/ 56( . ) (86) International application number: PCT/SE1996/000381 (87) International publication number: WO 1996/031036 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: CH DE DK ES FI FR GB IT LI NL (30) Priority: 30.03.1995 SE 19950001151 (71) Applicant: TELIA AB 126 86 Farsta (SE)	(72) Inventors: ALEXIUS, Staffan S-241 93 Eslöv (SE) WICKMAN, Johan S-237 35 Bjärred (SE) (74) Representative: Karlsson, Berne  Telia Research AB, Rudsjöterrassen 2 136 80 Haninge 136 80 Haninge (SE)